A molecule becomes more oxidized when it __________.

• A. loses electrons
• B. forms a covalent bond
• C. gains electrons
• D. decreases its oxidation number

Answer: (A)

Verified step by step guidance

1. Understand the concept of oxidation in chemistry: Oxidation is defined as the loss of electrons by a molecule, atom, or ion.
2. Recall that when a molecule loses electrons, its oxidation number increases, meaning it becomes more positively charged or less negative.
3. Recognize that gaining electrons is the opposite process, called reduction, which decreases the oxidation number.
4. Note that forming a covalent bond does not necessarily mean oxidation or reduction; it depends on the electron sharing and changes in oxidation states.
5. Conclude that the correct description of a molecule becoming more oxidized is when it loses electrons.